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From: Ingo Schwarze <>
To: Michael Forney <>
Subject: Re: [texi2mdoc] [PATCH] Use mtime of input file for date, and allow override from command-line
Date: Tue, 13 Nov 2018 09:50:46 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Hi Michael,

Michael Forney wrote on Mon, Nov 12, 2018 at 05:00:13PM -0800:

> I'm using texi2mdoc to generate ffmpeg manuals,

Just personally, or are you somehow affiliated with the ffmpeg
project (beyond sending occasional patches) and is that project
considering to use texi2mdoc(1)?

> and thought it would be useful to be a bit smarter about choosing
> the document date so that the output is reproducible.


> This patch changes texi2mdoc to use the mtime of the input file if
> given by name, falling back to the current time if reading from stdin
> or stat fails. In either case, the date can be given explicitly with
> the -d flag.

I agree, that's the right thing too do, pod2mdoc(1) behaves in a
similar way.

So i committed your patch with minimal tweaks (sorting headers,
sorting stack variables roughly by size, making the manual page
more similar too pod2mdoc(1)), also tweaking two nits while here:
%F was the wrong format for mdoc(7), and the usage string lacked
blanks between option letters and option arguments.

Thanks for the patch,

Log Message:
Add the -d option to specify the .Dd date,
and fall back to the mtime before resorting to the current time.
Patch from Michael Forney <mforney at mforney dot org>
with minimal tweaks by me.

While here, fix the date format, "%F" is wrong for mdoc(7).
Change it to "%B %e, %Y" which isn't perfect due to the
spurious blank before single-digit day numbers, but closer.

Modified Files:

Revision Data
Index: texi2mdoc.1
RCS file: /home/cvs/mdocml/texi2mdoc/texi2mdoc.1,v
retrieving revision 1.15
retrieving revision 1.16
diff -Ltexi2mdoc.1 -Ltexi2mdoc.1 -u -p -r1.15 -r1.16
--- texi2mdoc.1
+++ texi2mdoc.1
@@ -23,6 +23,7 @@
 .Nm texi2mdoc
 .Op Fl C Ar dir
+.Op Fl d Ar date
 .Op Fl I Ar dirs
 .Op Ar file
@@ -47,6 +48,17 @@ node-level documents placed within
 which must exist.
 These are created as
 .Pa prefix-NNN.7 .
+.It Fl d Ar date
+Set the output document date in the
+.Ic \&Dd
+macro to
+.Ar date ,
+to be specified in the format
+.Dq Ar Month Day , Year .
+If unspecified,
+uses the file modification date
+or the current date when reading from standard input.
 .It Fl I Ar dirs
 Colon-separated directories to search for
 .Li @include
Index: main.c
RCS file: /home/cvs/mdocml/texi2mdoc/main.c,v
retrieving revision 1.71
retrieving revision 1.72
diff -Lmain.c -Lmain.c -u -p -r1.71 -r1.72
--- main.c
+++ main.c
@@ -17,6 +17,9 @@
 #if defined(__linux__) || defined(__MINT__)
 # define _GNU_SOURCE /* memmem */
+#include <sys/stat.h>
 #include <assert.h>
 #include <ctype.h>
 #include <getopt.h>
@@ -26,6 +29,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 #include <unistd.h>
 #include "extern.h"
@@ -2341,9 +2345,12 @@ int
 main(int argc, char *argv[])
 	struct texi	 texi;
-	int		 c;
+	char		 date[32];
+	struct stat	 st;
 	char		*dirpath, *dir, *ccp;
 	const char	*progname, *Idir, *cp;
+	time_t		 t;
+	int		 c;
 	progname = strrchr(argv[0], '/');
 	if (progname == NULL)
@@ -2357,11 +2364,14 @@ main(int argc, char *argv[])
 	texi.seenvs = -1;
 	Idir = NULL;
-	while (-1 != (c = getopt(argc, argv, "C:I:")))
+	while (-1 != (c = getopt(argc, argv, "C:d:I:")))
 		switch (c) {
 		case ('C'):
 			texi.chapters = optarg;
+		case ('d'):
+ = optarg;
+			break;
 		case ('I'):
 			Idir = optarg;
@@ -2393,16 +2403,29 @@ main(int argc, char *argv[])
 			*ccp = '\0';
 		texi.dirs = parsedirs(&texi, dir, Idir, &texi.dirsz);
+		if (NULL == {
+			t = stat(argv[0], &st) == 0 ? st.st_mtime : time(NULL);
+			strftime(date, sizeof(date),
+			     "%B %e, %Y", localtime(&t));
+ = date;
+		}
 		parsefile(&texi, argv[0], 1);
 	} else {
 		texi.title = strdup("Unknown Manual");
 		texi.dirs = parsedirs(&texi, NULL, Idir, &texi.dirsz);
+		if (NULL == {
+			t = time(NULL);
+			strftime(date, sizeof(date),
+			     "%B %e, %Y", localtime(&t));
+ = date;
+		}
-	fprintf(stderr, "usage: %s [-Cdir] [-Idirs] [file]\n", progname);
+	fprintf(stderr, "usage: %s [-C dir] [-d date] [-I dirs] [file]\n",
+            progname);
Index: util.c
RCS file: /home/cvs/mdocml/texi2mdoc/util.c,v
retrieving revision 1.34
retrieving revision 1.35
diff -Lutil.c -Lutil.c -u -p -r1.34 -r1.35
--- util.c
+++ util.c
@@ -25,7 +25,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <time.h>
 #include <unistd.h>
 #include "extern.h"
@@ -1731,21 +1730,16 @@ texicache(struct texi *p, const char *bu
  * We use the title set with @settitle for the `Nd' description
  * and the source document filename (the first one as invoked on
  * the command line) for the title.
- * The date is set to the current date.
+ * The date is set to the modification time of the input.
 teximdocopen(struct texi *p, size_t *pos)
 	const char	*cp;
-	time_t		 t;
-	char		 date[32];
-	t = time(NULL);
-	strftime(date, sizeof(date), "%F", localtime(&t));
 	p->seenvs = -1;
 	teximacroopen(p, "Dd");
-	texiputchars(p, date);
+	texiputchars(p, p->date);
 	teximacroopen(p, "Dt");
 	for (cp = p->title; '\0' != *cp; cp++)
Index: extern.h
RCS file: /home/cvs/mdocml/texi2mdoc/extern.h,v
retrieving revision 1.29
retrieving revision 1.30
diff -Lextern.h -Lextern.h -u -p -r1.29 -r1.30
--- extern.h
+++ extern.h
@@ -422,6 +422,7 @@ struct	texi {
 	size_t		  valstackpos; /* position in valstack */
 	char		 *title; /* title of document */
 	char		 *subtitle; /* subtitle of document */
+	char		 *date; /* date of document */
 	int		  secoffs; /* see sectioner() */
 	struct texidex 	 *indexs; /* index entries */
 	size_t		  indexsz; /* entries in indexs */
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  reply	other threads:[~2018-11-13  8:50 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-13  1:00 Michael Forney
2018-11-13  8:50 ` Ingo Schwarze [this message]
2018-11-13  9:12   ` Michael Forney
2018-11-13  9:20     ` Ingo Schwarze

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